The Fire and Rescue NSW teams have spent the past three days preparing the Murray 1 and 2 hydroelectric stations for extreme fire weather predicted for Friday.

Inspector Frank Findlay said that work involved clearing perimeter grass and aerial dropping of retardant on slopes, surrounding the stations, that are inaccessible for fire trucks.

A total of 18 firefighters and four trucks have been stationed at the power hubs which are central to the electricity grid linking NSW and Victoria.

They are expected to remain on-site until Monday.

NSW Rural Fire Service trucks are shielding Khancoban which has largely been evacuated.

The closest fire ground to Khancoban was about 15 kilometres away, across the Murray River, near Towong on Thursday afternoon.

Member for Albury Justin Clancy visited the power stations on Thursday and spoke to their operator Snowy Hydro about fire preparations.

He later attended a town meeting at Tumbarumba where police, agriculture officials and an army chaplain spoke.

Mr Clancy said he was pushing for Greater Hume Shire to be part of a Regional Recovery Committee which already involves the Snowy Valleys Council and other south-east NSW areas.

Greater Hume mayor Heather Wilton noted the Talmalmo fire began in her shire and there had been significant land damage.

"It's not the same scale (as elsewhere in NSW), but it's developed from where it started in our shire and it's still dangerous in our shire," Cr Wilton said.

She said the River Road from Tunnel Road to Jingellic, which is mostly gravel, had been affected by the fire and cost the council up to $400,000 annually in maintenance.

Greater Hume has provided staff, graders and trucks to help Snowy Valleys Council.

South of the Murray River in Towong Shire the full extent of damage to the electricity infrastructure is yet to emerge.

Power supplier AusNet has largely still not been able to assess the fire's impact because of smoke halting aerial analysis and restricted ground impact.

A spokeswoman said there was hope repairs to the main line to Corryong may be done next week and they could reconnect places on branch lines.

On Thursday afternoon 950 customers were still without power.

Meanwhile, Murrumbidgee Local Health District is distributing free P2 masks from Corowa hospital and Culcairn, Henty and Holbrook multipurpose services.

Pharmacies across the district will also have masks from Monday.

Albury and Wodonga hospital emergency units are providing masks to patients with respiratory conditions.

A temporary air quality monitoring unit has been established in Wodonga by the EPA and has been providing readings from Wednesday night on the watchdog's website.

The impact of smoke saw the rating go from moderate to very poor across Thursday.